We report a measurement of the branching fraction of $B^+ o au^+
u_ au$ decays using a data sample of $772 imes 10^6 B ar{B}$ pairs,
collected at the $Upsilon(4S)$ resonance with the Belle detector at the KEKB
asymmetric-energy $e^+e^-$ collider. We reconstruct the accompanying $B$ meson
in a semileptonic decay and detect the $B^+ o au^+
u_ au$ candidate in
the recoiling event. We obtain a branching fraction of ${cal B}(B^+ o au^+
u_ au) = [1.25 pm 0.28 ({
m stat.}) pm 0.27({
m syst.})] imes
10^{-4}$. This result is in good agreement with previous measurements and the
expectation from calculations based on the Standard Model.
Note: answers to reviews or questions about the article must be posted in the forum section.
Authors are not allowed to review their own article. They can use the forum section.
browser Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)
REGISTER
Did you like this article? 
